<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/SpongeBob.jpg" width="61px" height="56px" />
        <span>后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <!-- :unique-opened="true" 等同于 unique-opened -->
        <el-menu
          background-color="rgb(22, 235, 235)"
          text-color="#000"
          active-text-color="rgb(255, 0, 0)"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的连接地址
      activePath: ''
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      // 清空token
      window.sessionStorage.clear()
      // 跳转到登录页
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      // console.log(res)
    },
    // 点击按钮，切换菜单的折叠和展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}

.el-header {
  background-color: rgb(223, 223, 60);
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #000;
  font-size: 20px;

  > div {
    display: flex;
    align-items: center;

    span {
      color: red;
      font-size: 18px;
      font-weight: 600;
    }
  }
}

.el-button {
  background-color: rgb(251, 213, 32);
}

.el-aside {
  background-color: rgb(22, 235, 235);

  .el-menu {
    border-right: none;
  }
}

.el-main {
  background-color: rgb(238, 220, 180);
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: rgb(12, 209, 209);
  font-size: 10px;
  line-height: 24px;
  color: #000;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}

</style>
